Walking boot



FIG. 1 is a perspective view of a walking boot according to the invention.

FIG. 2 is a side perspective view of the walking boot depicted in FIG. 1.

FIG. 3 is a side perspective view of the walking boot from the opposite side of FIG. 2; and,

FIG. 4 is a rear perspective view of the walking boot depicted in FIG. 1.

It is understood that the broken lines on the surface of the claimed design indicates stitch lines which form part of the claimed design. The circular elements on the surface of the claimed design illustrate portions of the walking boot which form no part of the claimed design. 

I claim the ornamental design for walking boot, as shown and described. 